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Neil Horman 3b885787ea net: Generalize socket rx gap / receive queue overflow cmsg ... Create a new socket level option to report number of queue overflows Recently I augmented the AF_PACKET protocol to report the number of frames lost on the socket receive queue between any two enqueued frames. This value was exported via a SOL_PACKET level cmsg. AFter I completed that work it was requested that this feature be generalized so that any datagram oriented socket could make use of this option. As such I've created this patch, It creates a new SOL_SOCKET level option called SO_RXQ_OVFL, which when enabled exports a SOL_SOCKET level cmsg that reports the nubmer of times the sk_receive_queue overflowed between any two given frames. It also augments the AF_PACKET protocol to take advantage of this new feature (as it previously did not touch sk->sk_drops, which this patch uses to record the overflow count). Tested successfully by me. Notes: 1) Unlike my previous patch, this patch simply records the sk_drops value, which is not a number of drops between packets, but rather a total number of drops. Deltas must be computed in user space. 2) While this patch currently works with datagram oriented protocols, it will also be accepted by non-datagram oriented protocols. I'm not sure if thats agreeable to everyone, but my argument in favor of doing so is that, for those protocols which aren't applicable to this option, sk_drops will always be zero, and reporting no drops on a receive queue that isn't used for those non-participating protocols seems reasonable to me. This also saves us having to code in a per-protocol opt in mechanism. 3) This applies cleanly to net-next assuming that commit 977750076d (my af packet cmsg patch) is reverted Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>		16 years ago
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bitops	asm-generic: rename atomic.h to atomic-long.h	16 years ago
4level-fixup.h	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	16 years ago
Kbuild	asm-generic: add a generic unistd.h	16 years ago
Kbuild.asm	KVM: export kvm_para.h	16 years ago
atomic-long.h	asm-generic: merge branch 'master' of torvalds/linux-2.6	16 years ago
atomic.h	asm-generic: add generic atomic.h and io.h	16 years ago
atomic64.h	lib: Provide generic atomic64_t implementation	16 years ago
audit_change_attr.h	…
audit_dir_write.h	…
audit_read.h	…
audit_signal.h	…
audit_write.h	[PATCH] asm/generic: fix bug - kernel fails to build when enable some common audit code on Blackfin	16 years ago
auxvec.h	asm-generic: add generic ABI headers	16 years ago
bitops.h	asm-generic: make bitops.h usable	16 years ago
bitsperlong.h	asm-generic: introduce asm/bitsperlong.h	16 years ago
bug.h	Eliminate thousands of warnings with gcc 3.2 build	16 years ago
bugs.h	asm-generic: add generic versions of common headers	16 years ago
cache.h	asm-generic: add generic NOMMU versions of some headers	16 years ago
cacheflush.h	asm-generic: add generic NOMMU versions of some headers	16 years ago
checksum.h	add generic lib/checksum.c	16 years ago
cmpxchg-local.h	…
cmpxchg.h	…
cputime.h	cputime: Optimize jiffies_to_cputime(1)	16 years ago
current.h	asm-generic: add generic versions of common headers	16 years ago
delay.h	asm-generic: add generic versions of common headers	16 years ago
device.h	Driver Core: Add platform device arch data V3	16 years ago
div64.h	…
dma-coherent.h	…
dma-mapping-broken.h	dma-mapping: add the device argument to dma_mapping_error()	17 years ago
dma-mapping-common.h	dma-ops: Remove flush_write_buffers() in dma-mapping-common.h	16 years ago
dma.h	asm-generic: add legacy I/O header files	16 years ago
emergency-restart.h	…
errno-base.h	…
errno.h	cfg80211: add rfkill support	16 years ago
fb.h	asm-generic: add generic versions of common headers	16 years ago
fcntl.h	fcntl: add F_[SG]ETOWN_EX	16 years ago
futex.h	…
getorder.h	asm-generic: rename page.h and uaccess.h	16 years ago
gpio.h	asm-generic/gpio.h: pull in linux/kernel.h for might_sleep()	16 years ago
hardirq.h	asm-generic: drop HARDIRQ_BITS definition from hardirq.h	16 years ago
hw_irq.h	asm-generic: add legacy I/O header files	16 years ago
ide_iops.h	…
int-l64.h	asm-generic: introduce asm/bitsperlong.h	16 years ago
int-ll64.h	asm-generic: introduce asm/bitsperlong.h	16 years ago
io.h	asm-generic: add generic atomic.h and io.h	16 years ago
ioctl.h	Make ioctl.h compatible with userland	17 years ago
ioctls.h	asm-generic: add generic ABI headers	16 years ago
iomap.h	…
ipcbuf.h	asm-generic: add generic sysv ipc headers	16 years ago
irq.h	asm-generic: add generic versions of common headers	16 years ago
irq_regs.h	…
irqflags.h	asm-generic: add generic versions of common headers	16 years ago
kdebug.h	asm-generic: define DIE_OOPS in asm-generic	17 years ago
kmap_types.h	kmap_types.h: rename D macro	16 years ago
libata-portmap.h	…
linkage.h	asm-generic: add generic versions of common headers	16 years ago
local.h	asm-generic: fix local_add_unless macro	16 years ago
memory_model.h	mm: remove CONFIG_OUT_OF_LINE_PFN_TO_PAGE	16 years ago
mm_hooks.h	…
mman-common.h	Merge branch 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6	16 years ago
mman.h	mm: add MAP_HUGETLB for mmaping pseudo-anonymous huge page regions	16 years ago
mmu.h	asm-generic: add generic NOMMU versions of some headers	16 years ago
mmu_context.h	asm-generic: add generic NOMMU versions of some headers	16 years ago
module.h	asm-generic: add generic versions of common headers	16 years ago
msgbuf.h	asm-generic: add generic sysv ipc headers	16 years ago
mutex-dec.h	mutex: speed up generic mutex implementations	17 years ago
mutex-null.h	…
mutex-xchg.h	mutex: speed up generic mutex implementations	17 years ago
mutex.h	asm-generic: add generic versions of common headers	16 years ago
page.h	asm-generic: add generic NOMMU versions of some headers	16 years ago
param.h	asm-generic: add generic ABI headers	16 years ago
parport.h	asm-generic: add legacy I/O header files	16 years ago
pci-dma-compat.h	dma-mapping: add the device argument to dma_mapping_error()	17 years ago
pci.h	PCI: remove pcibios_scan_all_fns()	16 years ago
percpu.h	x86/i386: Put aligned stack-canary in percpu shared_aligned section	16 years ago
pgalloc.h	asm-generic: add generic NOMMU versions of some headers	16 years ago
pgtable-nopmd.h	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	16 years ago
pgtable-nopud.h	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	16 years ago
pgtable.h	asm-generic: add dummy pgprot_noncached()	16 years ago
poll.h	…
posix_types.h	asm-generic: add generic ABI headers	16 years ago
resource.h	…
rtc.h	asm-generic: make get_rtc_time overridable	16 years ago
scatterlist.h	asm-generic: add generic versions of common headers	16 years ago
sections.h	asm/sections: add text/data checking functions for arches to override	16 years ago
segment.h	asm-generic: add generic NOMMU versions of some headers	16 years ago
sembuf.h	asm-generic: add generic sysv ipc headers	16 years ago
serial.h	asm-generic: add legacy I/O header files	16 years ago
setup.h	asm-generic: add generic ABI headers	16 years ago
shmbuf.h	asm-generic: add generic sysv ipc headers	16 years ago
shmparam.h	asm-generic: add generic sysv ipc headers	16 years ago
siginfo.h	HWPOISON: Add new SIGBUS error codes for hardware poison signals	16 years ago
signal-defs.h	asm-generic: rename termios.h, signal.h and mman.h	16 years ago
signal.h	asm-generic: add generic ABI headers	16 years ago
socket.h	net: Generalize socket rx gap / receive queue overflow cmsg	16 years ago
sockios.h	asm-generic: add generic ABI headers	16 years ago
spinlock.h	asm-generic: add generic versions of common headers	16 years ago
stat.h	asm-generic: add generic ABI headers	16 years ago
statfs.h	remove __KERNEL_STRICT_NAMES	16 years ago
string.h	asm-generic: add generic versions of common headers	16 years ago
swab.h	asm-generic: add generic ABI headers	16 years ago
syscall.h	asm-generic: syscall_get_nr returns int	16 years ago
syscalls.h	asm-generic: add generic versions of common headers	16 years ago
system.h	asm-generic: add generic versions of common headers	16 years ago
termbits.h	asm-generic: add generic ABI headers	16 years ago
termios-base.h	asm-generic: rename termios.h, signal.h and mman.h	16 years ago
termios.h	asm-generic: add generic ABI headers	16 years ago
timex.h	asm-generic: add legacy I/O header files	16 years ago
tlb.h	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	16 years ago
tlbflush.h	asm-generic: add generic NOMMU versions of some headers	16 years ago
topology.h	cpumask: remove obsolete node_to_cpumask now everyone uses cpumask_of_node	16 years ago
types.h	asm-generic: add generic ABI headers	16 years ago
uaccess-unaligned.h	asm-generic: rename page.h and uaccess.h	16 years ago
uaccess.h	asm-generic: uaccess: fix up local access_ok() usage	16 years ago
ucontext.h	asm-generic: add generic ABI headers	16 years ago
unaligned.h	asm-generic: add generic versions of common headers	16 years ago
unistd.h	perf: Do the big rename: Performance Counters -> Performance Events	16 years ago
user.h	asm-generic: add generic versions of common headers	16 years ago
vga.h	asm-generic: add legacy I/O header files	16 years ago
vmlinux.lds.h	Optimize the ordering of sections in RW_DATA_SECTION.	16 years ago
xor.h	…